Industrial wastewater treatment covers the mechanisms and processes used to treat wastewater that is produced as a byproduct of industrial or commercial activities. After treatment, the treated industrial wastewater (or effluent) may be reused or released to a sanitary sewer or to surface water in the environment. Most industries produce some wastewater although recent trends in the developed world have been to minimize such production or recycle such wastewater within the production process. However, many industries remain dependent on processes that produce wastewater. There are various treatment technologies for treating effluent of different types of industries. Some of them are: Effluent Treatment Plants
UASB
Up flow anaerobic sludge blanket (UASB) technology, normally referred to as UASB reactor, is a form of an anaerobic digester that is used for wastewater treatment. The UASB reactor is a methanogenic (methane-producing) digester that evolved from the anaerobic clarigester. Similar but variant technology to UASB is the expanded granular sludge bed (EGSB) digester.UASB uses an anaerobic process whilst forming a blanket of granular sludge which suspends in the tank. Wastewater flows upwards through the blanket and is processed (degraded) by the anaerobic microorganisms. Effluent Treatment Plants
Trickling Filler
A trickling filter consists of a bed of rocks, gravel, slag, peat moss, or plastic media over which wastewater flows downward and contacts a layer (or film) of microbial slime covering the bed media. Aerobic conditions are maintained by forced air flowing through the bed or by the natural convection of air. The process involves the adsorption of organic compounds in the wastewater by the microbial slime layer, and diffusion of air into the slime layer to provide the oxygen required for the biochemical oxidation of the organic compounds. The end products include carbon dioxide gas, water and other products of oxidation. As the slime layer thickens, it becomes difficult for the air to penetrate the layer and an inner anaerobic layer is formed. Effluent Treatment Plants
Chemical Treatment
In Chemical treatment, Effluent is treated with chemical reaction, generally, Lime Alum and poly are used for chemical reactions. A chemical reaction involves two processes, coagulation and flocculation. After that sludge is removed from the system and clear water is treated further.